helping
                    - Jack must be helping his grandma to water the flowers,______?
 - The policeman is helping the old woman _____ a heavy bag on her back. [ ]
 - The policeman is helping the old woman_____ a heavy bag on her back. [ ]
 - The policeman is helping the old woman ______ a heavy bag on her back. [ ]
 - Thank you _____ helping me _____ my work. [ ]
 - I’m helping my mother_________.[ ]
 - Millie and Kitty are good friends, they often _________ each other _________study.
 - Thank you for______ me______ my bike riding.- You’re welcome.
 - Look! David is helping his mother _______ the room.
 - Volunteering is becoming popular in China .— Yeah, people are now aware that helping others is helping themselves.